Submerged concentrating-table.



W. A. HUELSDONK.

SUBMERGED CONCENTRATING TABLE.

IIIIIIIIIIIIIIIII AR- 2, 19H. 1,270,736. Patented June 25, 1918.

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APPLICATIO 1. 1,270,736. Patented June 25, 1918.

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m'lll'aggAfllelswnlc TTORNE Y UNITED STATES PATENT OFFICE.

WILLIAM A. HUELSDONK, 0F MODESTO, CALIFORNIA.

SUBMERGED CONCENTRATING-TABLE.

To all whom it may concern:

Be it known that I, WILLIAM A. Horns- DONK, a citizen of the United States, residing at Modesto, in the county of Stanislaus, State of California, have invented certain new and useful Improvements in Submerged Concentrating-Tables; and I do declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

a This invention relates to concentrating tables used for the recovery of precious metals from sand, slime or similar material. The object of the invention is to produce a concentrating table actuated by machinery which will perform its functions in a manner similar to that of the ordinary miners washing pan. In the use of the miners washing pan, the material is held continually submerged and the coarse nonvaluable slime or dirt gradually agitated from the edge of pan leaving the precious metals collected at the bottom edge of the pan. This same function I accomplish by means of machinery. I first have a concentrating table which is continually submerged under water with no perceptible wash of the Water over the table. I then agitate the table in such a manner as to pass the material continually in one longitudinal direction. The edges of the table are inclined in such a manner as to taper the tableat the end toward which the material is advancing. By means of this structure the agitation will continually move the coarser sand, slime or dirt over the edges of the table, while the precious metals will concentrate at the center of the table and be carried down to a receiving point.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purposes for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views.

Figure 1 is a side elevation of the complete structure.

Fig. 2 is a vertical transverse section of the receiving boxes and the concentrating table mounted therein.

Specification of Letters Patent.

Patented June 25, 1918.

Application filed March 2, 1917. Serial No. 151,915.

Fig. 3 is a top plan view of the receiving boxes and table.

Fig. 1 is a side elevation of the same broken out and in section at various points to show the internal structure of the parts.

Fig. 5 is a fragmentary view in section of the receiving end of the table showing how the material is passed from the distributing bin onto the table proper.

Referring now more particularly to the characters of reference on the drawings, I first provide an outside container or trough 1 which is provided with an overflow outlet 2 at its receiving end and with a discharge outlet 3 at its discharging end having a door 3 normally bolted over the same whereby it can be opened and closed at will. Within this container 1 is provided the inner table supporting trough 4 which is of a lesser depth than the container 1 and fits between the sides of such container along its entire length. This trough 4: is supported by means of cross beams 5 mounted on the upper edges of the container 1 by means of ball bearings 6 whereby the trough 1 may have vibratory motion with respect to the container 1 in a manner as will presently appear.

Supported from the cross beams 5 by means ofsuitable hangers 7 is the concentrating table 8. The sides of this table 8 converge from its receiving end toward its discharge end in order to provide a tapering space between the edges of the table and the side wallsof the trough 4:.

At the receiving end of the table 8 is a feed hopper 9 which discharges through an opening 10 into a lower receptacle 11 underneath the said table 8. This receptacle 11 has an upwardly inclining bottom which in clines toward an open slot 12 in the table 8 arranged in advance of the receiving slot 10. From the outer end of this slot 12 the table 8 is provided with a central groove 13. Riffies 14L incline from the outer edges of the table 8 toward the groove 13 and below the table 8 is an auxiliary table 15 having riffles 16 for a purpose as will presently appear.

mixed With the Water from the pipe 18 into the hopper 9 from whence it passes into the metals finally passes into the trough 4 and receptacle 11. The trough 4L and incidentally the table 8 are kept in a continual agitation by means of a suitable vibrator driven by the motor 20 (not described or claimed). This causes the trough 4 to vibrate back and forth onthe roller bearings 6. This motion keeps the material from the receptacle 11 forcing through the opening12 and onto the table 8 and thence down the length of the table. 'The table 8 being continually submerged as is the material in a miners pan, this causes a separation of the precious metals from the gross material and causes these metals-to concentrate on the riflies 14 and down the groove 13. The table Sbeing tapered, the gross material then passes over the edge thereof Where any second grade of precious metal is caughtby the riflles 16 on the auxiliary table 15. The gross material being thus separated from the precious out through the discharge openingsor chutes 21 therein, Which; discharge into the outer container 1 from which they are eventually discharged throughthe outlet 3..

The precious metal passing down through the groove 13 and the rifiies 16eventually discharges upon a receiving plate 22 suitably shaped to receive the-same. Around this plate 22 is an inclosed boxing 23 leading from Which is a suction pipe 24 operated by the pump 19 in any suitable manner. 9 The suction through the pipe at draws ofi any accumulated slimes which might eventually reach the plate 22 and the same are then' carried back through the pipe 18 and discharged again into the hopper 17.

Above the table 8 at spaced points are small inclined plates 25 inclined against the direction of flow of the material. -These are spaced a slight distance above the table 8 and are designed to break any tendency of the slimes or gross material to accumulate or cake upon the table. That is, the material passing'down' the table and encountering these cross plates Will be forced to ride overand under the same Which Will disseminate them and prevent them from massing. The

plate 22 may be suitably Washed Whenever a desired by means of the discharge of Water through a faucet26 leading from the pipe 18. From the foregoing description it Will be readily seen that I have produced such a device as substantially fulfils the object of.

the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of.

the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the,

invention as defined bytheappended claims;

Having thus described my invention what! I claim as new and useful and desire yto lsecure byLetters Patent is: p A

1. A concentrating table mounted :for vibratory motion and arranged to be con-- tinuously submerged, a receptacle arranged beneath one end of the tabla-such tableahaving an opening communicating Withoneend of the receptacle and another opening/lead ing from the receptacle back to :the table,

the table being provided With a central groove and radiating riffies leading from the second named opening. Y

2. The combination with .a Water contain- 3;. A concentrating table mounted foravibratory motion and arranged to becontinu ously submerged, a receptacle .arr'anged'beneath one end of the table ,csuc h table ihavingv an opening communicating "with one .end'of the receptacle and another =openin-gjleading I from the. receptacle back to the table, the table being provided with a central groove and radiating riiiies leading ..from the sec 0nd named opening, the, bottom of the ,re-

ceptacle inclining up to the outer end of the second named opening.

In testimony WhereofI a fiiax signature,

WILLIAM .A. HUELSDONK; [1

Copies of this patent may be obtained. forfivecents each, byaddressing' the Commissioner of Eatents,

- Washington, .D. 6. 

